Heeelp!!!

Hi, soo i'm just about to start a poultary farm for breeding hens chickens and rooster if it's called so or getting as many chickens/hens/roosters as possible for commercial matters.

So i know there ain't an exact answer or formula to knowing this but one can make a qualified guess.
I wonder how long time will I have 100/1000/10000 hen/chickens if I start out with 50 hens and 5 roster. We will have to pretend that no chickens/hens dies in the process. And I'll be selling the overflow of roosters because per 10 hens I can only have one rooster.

Well, that would entirely depend on how often and how many eggs you hatch. Each hen depending on breed could give you between 3 to 7 eggs a week. Let's say four eggs a week each just as a good middle ground number. That gives you 200 eggs a week. Set all those and start hatching 200 chicks a week and you could very quickly hit 1,000 chickens.

Don't do any of that without the space and facilities to house 1000 birds and raise that many chicks, though.

You haven't specified whether the goal of this endeavor is to produce meat, eggs, or breeding stock for sale.

If you aim to be a meat producer, you will probably meet your goal in very short order. If you wish to breed for a commercial egg operation, it may take somewhat longer to achieve your goal. There are much quicker and easier ways to arrive at the optimum number of layers to have an egg business than to breed your own laying hens.

If breeding is your sole purpose and goal, you will not see any impressive success for a good number of years.